// For flags

CVE-2021-47534

drm/vc4: kms: Add missing drm_crtc_commit_put

Severity Score

4.1
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

In the Linux kernel, the following vulnerability has been resolved:

drm/vc4: kms: Add missing drm_crtc_commit_put

Commit 9ec03d7f1ed3 ("drm/vc4: kms: Wait on previous FIFO users before a
commit") introduced a global state for the HVS, with each FIFO storing
the current CRTC commit so that we can properly synchronize commits.

However, the refcounting was off and we thus ended up leaking the
drm_crtc_commit structure every commit. Add a drm_crtc_commit_put to
prevent the leakage.

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: drm/vc4: kms: agregar drm_crtc_commit_put faltante el commit 9ec03d7f1ed3 ("drm/vc4: kms: esperar a los usuarios FIFO anteriores antes de una confirmación") introdujo un estado global para HVS, con cada FIFO almacena El commit CRTC actual para que podamos sincronizar correctamente las confirmaciones. Sin embargo, el recuento no se realizó y, por lo tanto, terminamos filtrando la estructura drm_crtc_commit en cada confirmación. Agregue un drm_crtc_commit_put para evitar la fuga.

*Credits: N/A
CVSS Scores
Attack Vector
Local
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-05-24 CVE Reserved
  • 2024-05-24 CVE Published
  • 2024-05-25 EPSS Updated
  • 2024-12-19 CVE Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.12 < 5.15.7
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.12 < 5.15.7"
en
Affected
Linux
Search vendor "Linux"
Linux Kernel
Search vendor "Linux" for product "Linux Kernel"
>= 5.12 < 5.16
Search vendor "Linux" for product "Linux Kernel" and version " >= 5.12 < 5.16"
en
Affected